Cutting attachment for dragline buckets



' Aug. 30, 1949. R, w. JENNE' CUTTING ATTACHMENT FOR DHAGLINE BUCKETS Filed Oct. 20, 1 947 2 Sheets-Sheet l INVEN TOR. RALPH W. J'ENNE BY Arron/v5) Aug. 30, 1949. I R. w. JENNE 2,480,656

CUTTING ATTACHMENT FOR DRAGLINE BUCKETS I Filed Oct. 20, 1947 2 Sheets-Sheet 2 INVENTOR. RALPH W JENNE,

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ATTORNEY Patented Aug. 30, 1949 UNITED STATES eAreNr ,OFFIQE CUTTING ATTACHMENT, FOR D AGLINE suc ers Ralph J enne, LakeWorth, Flair Application October 20, 1947, SerialNo. 780,847

' This invention relates to improvements in excavating apparatus and has particular reference to detachable cutting blades for use in connection with dragline buckets. 7

It has been common and relatively expensive practice in excavating ditches or drainage canals to first excavate the ditch and then by a separate operation, go back and bevel or incline the walls of the ditch to avoid unnecessary caving in of the walls, as is common in straight side ditches. It is an object of'the present invention to provide attaching cutters to the conventional dragline bucket," inclineda predetermined degree out- Wardly andsuitablybraced, so that a single operation of the dragline' bucket will not only excavate the ditch, but will at the same time bevel the side walls thereof, thus avoiding a separate operation.

'A'further object of the invention resides in the extreme simplicity of the attachment, requiring no alterations of the dragline bucket, is quickly attached or dismounted, will not interfere with the dumping of the bucket, is strong, durable, cheap to manufacture, is highly eflicient in use and will result in a considerable saving of the cost of excavating such ditches as require bevelled side walls; e

Other and important objects of the invention will readily present themselves during the course of the following description, reference being had to the accompanying drawing, wherein:

Figure 1 is a front elevational view of a dragline bucket with the invention attached and in use,

Figure 2 is a top plan view thereof,

Figure 3 is a side elevation of the bucket, with the invention attached and illustrating a dotted line position of the bucket in dumping position.

Line numerals refer to like parts throughout the several figures of the drawing.

Referring specifically to the drawings, the numeral 5 designates a dragline bucket of conventional scoop form, having side walls 6, a rear end I, a bottom 8 and a forward open end spanned by an arched reinforcing member 9. The forward edge of the bottom terminates in cutting teeth In. The forward edge of the reinforcing member 9 upon opposite sides and adjacent the bottom is provided with spaced apertured lugs ll, integral therewith and serving as connecting means for the clevis of draft chains l2, the clevis being held in interlocking position by pins or bolts l3. Reinforcing side members [4, preferably integral with the arch member 9, extend rearwardly along the side walls of the bucket to a point adjacent the rear of the bucket, where they are provided with'swivel sockets 15, serving as a swivel connecting means for lifting chains it carried by across bar IT. The bar I! is controlled by suitable and well known lifting means embodying a pulley l8 supported-from and controlled by the well known dragline mechanism. Centrally disposed upon the' top of the arch 9 is a pair of spaced integral lugs l9, serving asa pivotal connection with a cable 20; The cable 20 passes aboutthe pulley l8 and'is controlled in the usual manner for operation of the bucket. The-structure so far described covers a well known dragline bucket adapted to operate in the conventional manner. v

'- The invention comprises a pair of flat rigid cutting blades 2|,inclihed outwardly and rearwardly-with'respect to the bucket upon opposite sides and has'its forward edges preferably sharpened at-2 2; The lower ends 23 of the blades are bent inwa'rdly, as shown in Figure 1', are apertured for the reception of the bolts [3 and when attached, as shown, the bolts rigidly maintain the lower ends of the blades fixed with respect to the bucket. The predetermined outward inclination of the blades has been determined according to the bevel desired upon the walls of the ditch. The blades are rigidly maintained in their outward inclination by divergent braces 24, having their inner e'ndsbent downwardly at and apertured for the reception of thepivotal means of the lugs l9, where such ends- 25 are rigidly held against movement. The outer endsof the braces are welded or otherwise rigidly connected with the blades, as clearly illustrated on Figures 1 and 2. Rearwardly convergent braces 26 may be welded to the blades adjacent the connection of the braces 24, or they may be formed integral therewith. The braces 26 extend rearwardly and are provided with apertures adjacent their ends for the reception of the swivel means carried by the sockets 15. Thus, it will be seen that the blades are maintained rigid against bending or shifting by the braces 25 and 26. The rearward inclination of the blades 2| provide a slicing action during the forward motion of the bucket and results in a simultaneous bevelling of the walls of the ditch as the bucket continues its excavation. The rearward inclination of the blades further permits an unobstructed dumping of the bucket, as illustrated in Figure 3. While the blades 2! have been shown as having their forward edges sharpened, it may be found desirable under certain condition to provide these blades with detachable blade sections to permit removal for sharpening or replacement.

In use, the device is attached to the dragline bucket simply by removing the retaining nuts on the bolts [3, the retaining nuts on the pivotal means of the lugs 19 and the retaining nuts on the swivel means of the sockets I5. The blades and braces are then positioned with their ends engaging the several bolts, pivotal means and swivel means and the nuts engaged, securely fastening the structure in operative position. Operation of the bucket along the lirie'determined gradually forms the ditch and as the ditch becomes increasingly deeper, the blades engage and start their bevel cut. Thus, it will be seen that the single operation of excavating the ditch has provided the bevel side walls, heretofore requiring the operator to go back to produce'thebevel as 'a separate and expensive operation.

It will therefore be seen that a very efficient device has been provided, requiring a minimum'of time for attachment, results in a great saving in time i labor, ha 9 Pa i t M 913 d a E d requires 1 m int e n e .9 thee an occasional sharpening of the cutting edges oi theblades.

It is to be understood that the invention is not i ed to t r ci a xaeeemeat s ew? bu that it includes within its purview, whatever changes ffairly come Within either the terms or t e sp t f t a d d claim H i d s r ed m inr n n W at I c aim is;

1- In binatio a dr i e b kct evin a e we Open d r ni eq b s a ched meme" les i med on th embed m mber, raft means connected to the lugs, cable connecting l g Mi d t to -o th embed memb w ve me n r d by t e bu ke u on p os e sides, cutting blades detachably connected upon Opposite i o he uek t aid'bla lss in l ned utwardl a mamae H9 2 t ir'n nt c a a ment lfii e W395 @311 P3 19h? d s d d h b y co ne ted 9 the t ble con ect n l nd c earw rsil c nver in brews ca ied b th l s d do ged -scamm d with the swivel means. Y

n tion dr sl nc ucket ha n limit m a s a -ra in ll wtnpine'mea s 3 1 ins l d d t h blv an ri d su ported pon O s t de 9 th bu k t bebledes b n el-m t ardl nd rearrarsi y iron? their Poi t of ttachm a r ir'o div r ent rates car d byJt b d and be n r dly a Q tach bl e e ted to t e u ket for main ainigs the blades in their outer angle of inclination, a pair of rearwardly extending converging braces carried by the blades and being rigidly and detachably connected to the bucket for maintaining the rearward angle of inclination of the blades.

3. A bevelling attachment for dragline buckets comprising a pair of earth cutting blades arranged upon opposite sides of the bucket for bevelling'the walls of ditches termed by the bucket, 'said blade's having sharpened forward cutting edges, said blades rigidly attached to the bucket adjacent its forward lower corners and inclined outwardly and rearwardly from their point of attachment,"divergent braces carried by the blades and detachably and rigidly connected to the bucket; and rearwardly converging braces carried by the bucket and rigidly and detachably connected to the bucket, said braces serving to maintain the blades in their angular cutting position throughout the operation of the bucket.

i A s ite Wa b ye l ns achment for d a l e seawate s em tyin tqr e in i, '.:1,%;et, sameness Ia ta bf i ical bu n siitli 1hclined blades having forward cutting edges, Pled e h ing and pr slp idd w th ii turje 'f r attachment to th draa l e more uiq rpqsi e s de's a d blade teasers be mine o tw rdl and rea warm rrdntha; apertures ends; and lateral'an'd longitudinal brac' by 11 l d 'fr de a h e mip cl qn to t e 1 1 .9??? Sa d b c "hav n as; iid P b i i' with apertures i eeeia tment Q -e' f nin EFEBENQES 0 m} The following anathema of record in the fileioi this patent:

N b r Date Re. 11,516 Davy Dec; ;3, 1835 1,936,853 R n h 18, 1935 2,353,685 Askue Jul 18, 19.4

i mana ement Y Number entry 589 Germany a e-w.- Dsc- 1 19222 

